Features-400 new/changed(?) difficulties on old songs-100 titles (I assume they mean like ranks) you can unlock-Some sort of online matchmaking system-100 new songs, covering all 5 types.-The high tier grades have been revamped, with silver S now just being S, gold S being SS, and old SS being SSS.-Step creators are confirmed to be credited to some extent in-game this time around as opposed to just on the website.-K-Pop now sorts behind Originals in Channel Select

Expect it in January for arcades, mobile devices, and browsers! No word yet if all versions will share all music or at least all new music.

Update: Didn't realize the Arcade version was being shown off at IAAPA. some additional info from them

Update 2: Day 2 brings 5 new songs, none of which were in the trailer!

Update 3: Pump it Up now has its own YouTube channel idependent of Andamiro's main one, and it has made its inaugural video the second boss song for XX, a new track called Skeptic by Doin. Later in the day, an updated promo added in Club Night by Matduke.

Looks like the "online matchmaking" is not really online play, but rather, playing against a ghost of someone else's score.

--------------

Quote (BlueballFragginCrunch @ 02:48 CST :: 12/11/2007)

and now children let's bat attention to your mother wher I accidentally combed my hair with a toothbrush. that's right my children for I am the jesus to annhilate your m other frog. christy chexios and a peas full of morning.